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I'm trying to upgrade memory of an HP Probook 6550b laptop. I happen to have a Dell inspiron with 2 branches:

4GB PC3L 12800S Part number: HMT451S6BFR8A (manu: hynix)

The RAM on my probook should according to what I understand in this work (search DDR3 for references or go to p.4 of chapter one).

The computer will boot. System info at startup will show 8192 mb of ram, which is what I inserted (2 slots). However, when I try to actually boot it shuts down. Similarly if I try to run memory tests.

Note that I am trying to use a PC3L in a PC3 slot - but according to a similar question on this exchange, this should be fine.

Is there something I may have to do to make this work, or is the ram I'm trying to put in just not compatible?

Francky_V
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If the RAM does not work, then you bought the wrong one. I hope you can still be reimbursed for it.

The funny thing is that when I go on the Skhynix RAM selection page, and I enter 4GB and 1.35V, I already get other RAM sticks than the one you bought. In fact, yours is not at all in the list.

Fitting RAM to a computer is an extremely complex operation. To appreciate how complex this is, see this answer of mine.

If you wish to get RAM that is guaranteed to work, go to the Crucial website, and download and use the Crucial System Scanner. It will scan your hardware and give you a list or RAM sticks that will fit it. The prices of Crucial are competitive and the RAM is guaranteed.

harrymc
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  • I'm trying to salvage RAM I already have from another computer - would be nice if it worked but not a huge deal if not. It's a somewhat older laptop, therefore probably not the latest ram brnaches (but then the computer I'm trying to fit it on isn't new either). I guess I'll check with crucial & order some then... Thanks. – Francky_V Nov 12 '17 at 19:48